FlexCAN not compiling

[mfarver]

Arduino 2.3.4 with the latest Teensy libraries I'm having an issue compiling FlexCAN:

In file included from Arduino15\packages\teensy\hardware\avr\1.59.0\libraries\FlexCAN\FlexCAN.cpp:10:
Arduino15\packages\teensy\hardware\avr\1.59.0\libraries\FlexCAN\kinetis_flexcan.h:137: warning: "FLEXCAN1_MCR" redefined
137 | #define FLEXCAN1_MCR (*(vuint32_t*)(FLEXCAN1_BASE))
|
In file included from Arduino15\packages\teensy\hardware\avr\1.59.0\cores\teensy4/core_pins.h:32,
from Arduino15\packages\teensy\hardware\avr\1.59.0\cores\teensy4/wiring.h:39,
from Arduino15\packages\teensy\hardware\avr\1.59.0\cores\teensy4/WProgram.h:46,
from \arduino\sketches\EEBD7E7FF7A01E5DD2C5330FDD90FF98/pch/Arduino.h:6,
from Arduino15\packages\teensy\hardware\avr\1.59.0\libraries\FlexCAN\FlexCAN.h:9,
from Arduino15\packages\teensy\hardware\avr\1.59.0\libraries\FlexCAN\FlexCAN.cpp:9:
Arduino15\packages\teensy\hardware\avr\1.59.0\cores\teensy4/imxrt.h:3243: note: this is the location of the previous definition
3243 | #define FLEXCAN1_MCR (IMXRT_FLEXCAN1.offset000)


My code is just trying to bring up the library:

#include <FlexCAN.h>

void setup() {
  Can0.begin(500000); 
}
void loop() { }

 

[jmarsh]

From the looks of it that library is not intended for use with Teensy 4.x, it hasn't been touched in over 10 years (well before 4.0 came out).

 

[mfarver]

Doh, good call. This works much better.

#include <FlexCAN_T4.h>
FlexCAN_T4<CAN1, RX_SIZE_256, TX_SIZE_16> can1;

void setup() {
can1.begin();
can1.setBaudRate(500000);
}